:root {
    --primary: #0A1628;
    --secondary: #1E6091;
    --observe: #2EC4B6;
    --operate: #4CAF50;
    --protect: #FF9800;
    --govern: #7B61FF;
    --security: #E53935;
    --surface: #FAFBFC;
    --text: #1A1A2E;
    --text-muted: #5A6275;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-accent: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --max-width: 1120px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-body);
    color: var(--text);
    background: var(--surface);
    line-height: 1.6;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--secondary);
    color: #fff;
}

.btn-primary:hover {
    background: #185279;
}

.btn-secondary {
    background: transparent;
    color: var(--secondary);
    border: 2px solid var(--secondary);
}

.btn-secondary:hover {
    background: var(--secondary);
    color: #fff;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto 48px;
    font-size: 1.05rem;
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #fff;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--secondary);
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 8px;
}

.logo-text {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #fff;
}

/* Hero */
.hero {
    padding: 160px 0 100px;
    background: var(--primary);
    text-align: center;
    color: #fff;
}

.hero-eyebrow {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--observe);
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-accent);
    font-size: 3.5rem;
    font-weight: 500;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 580px;
    margin: 0 auto 40px;
    line-height: 1.65;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Pillars */
.pillars {
    padding: 100px 0;
}

.pillar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.pillar-card {
    padding: 40px 32px;
    border-radius: 16px;
    border: 1px solid #e2e6ed;
    background: #fff;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pillar-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.pillar-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 4px 12px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.pillar-observe .pillar-label {
    background: rgba(46, 196, 182, 0.12);
    color: var(--observe);
}

.pillar-operate .pillar-label {
    background: rgba(76, 175, 80, 0.12);
    color: var(--operate);
}

.pillar-protect .pillar-label {
    background: rgba(255, 152, 0, 0.12);
    color: var(--protect);
}

.pillar-govern .pillar-label {
    background: rgba(123, 97, 255, 0.12);
    color: var(--govern);
}

.pillar-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.pillar-card p {
    color: var(--text-muted);
    line-height: 1.65;
}

/* Products */
.products {
    padding: 100px 0;
    background: #fff;
}

.product-group {
    margin-bottom: 48px;
}

.product-group:last-child {
    margin-bottom: 0;
}

.group-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid;
}

.group-observe {
    color: var(--observe);
    border-color: var(--observe);
}

.group-operate {
    color: var(--operate);
    border-color: var(--operate);
}

.group-protect {
    color: var(--protect);
    border-color: var(--protect);
}

.group-govern {
    color: var(--govern);
    border-color: var(--govern);
}

.product-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.product-card {
    padding: 24px;
    border-radius: 12px;
    border: 1px solid #e2e6ed;
    background: var(--surface);
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
    border-color: var(--secondary);
}

.product-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Guard */
.guard {
    padding: 100px 0;
    background: var(--primary);
    color: #fff;
}

.guard-inner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.guard-inner .section-title {
    color: #fff;
    margin-top: 20px;
}

.guard-inner .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.guard-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 6px 16px;
    border-radius: 4px;
    background: rgba(229, 57, 53, 0.2);
    color: #ff6b6b;
}

.guard-features {
    list-style: none;
    text-align: left;
    margin: 40px 0;
}

.guard-features li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
}

.guard-note {
    font-family: var(--font-accent);
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.6);
    font-style: italic;
    margin-top: 32px;
}

/* Stats */
.stats {
    padding: 80px 0;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-accent);
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--secondary);
    letter-spacing: -0.02em;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    margin-top: 4px;
}

.stats-note {
    text-align: center;
    color: var(--text-muted);
    max-width: 540px;
    margin: 0 auto;
    font-size: 0.95rem;
}

/* Footer */
.footer {
    padding: 48px 0;
    background: var(--primary);
    color: rgba(255, 255, 255, 0.5);
}

.footer-inner {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.footer-tagline {
    font-family: var(--font-accent);
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 16px;
}

.footer-copy {
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.4rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .pillar-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav-links {
        gap: 20px;
    }
}

/* Product Detail Pages */
.product-hero {
    padding: 140px 0 80px;
    color: #fff;
}

.product-hero.pillar-observe {
    background: linear-gradient(135deg, var(--primary) 0%, #0d3b4a 100%);
}

.product-hero.pillar-operate {
    background: linear-gradient(135deg, var(--primary) 0%, #1a3d1a 100%);
}

.product-hero.pillar-protect {
    background: linear-gradient(135deg, var(--primary) 0%, #3d2a0a 100%);
}

.product-hero.pillar-govern {
    background: linear-gradient(135deg, var(--primary) 0%, #2a1a4a 100%);
}

.product-hero .pillar-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 4px 12px;
    border-radius: 4px;
    margin-bottom: 16px;
}

.pillar-observe .pillar-label,
.product-hero.pillar-observe .pillar-label {
    background: rgba(46, 196, 182, 0.2);
    color: var(--observe);
}

.pillar-operate .pillar-label,
.product-hero.pillar-operate .pillar-label {
    background: rgba(76, 175, 80, 0.2);
    color: var(--operate);
}

.pillar-protect .pillar-label,
.product-hero.pillar-protect .pillar-label {
    background: rgba(255, 152, 0, 0.2);
    color: var(--protect);
}

.pillar-govern .pillar-label,
.product-hero.pillar-govern .pillar-label {
    background: rgba(123, 97, 255, 0.2);
    color: var(--govern);
}

.product-back {
    display: inline-block;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 32px;
    transition: color 0.2s;
}

.product-back:hover {
    color: #fff;
}

.product-title {
    font-family: var(--font-accent);
    font-size: 3rem;
    font-weight: 500;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.product-tagline {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 580px;
    line-height: 1.65;
}

.product-body {
    padding: 80px 0;
}

.product-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
}

.product-description h2,
.product-features h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary);
}

.product-description p {
    color: var(--text-muted);
    line-height: 1.75;
    margin-bottom: 16px;
}

.product-features ul {
    list-style: none;
}

.product-features li {
    padding: 12px 0;
    border-bottom: 1px solid #e2e6ed;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.product-features li::before {
    content: '→';
    margin-right: 12px;
    color: var(--secondary);
    font-weight: 600;
}

@media (max-width: 768px) {
    .product-title {
        font-size: 2.2rem;
    }

    .product-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

/* Logo */
.logo-icon {
    height: 36px;
    width: 36px;
}